Motor fuel



.ketones such as ether or acetone.

Patented Oct. 13, 1925.

UNITED STATES 3 V 1,557,257 PATENT OFFICE.

JEAN LA RIBOISIERE, OF WASHINGTON, DISTRICT OF COLUMBIA.

MOTOR FUEL.

No Drawing.

To all whom it may concern:

Be it known that I, JEAN LA Rlnorsinnn. a citizen of the Republic ofFrance, residing at Washington, District of Columbia, have inventedcertain new and useful Improvements in Motor Fuels, of which thefollowing is a specification.

This invention relates to fuels, for in ternal combustion engines. Morespecifically my invention relates to the prevention of engine knock, andto the provision of a fuel which is economically efficient and willadmirably remove that which is commonly formed by addlng to liquidhydrocarbons,

aniline or its derivatives and a blending agent, preferably ether. Sucha fuel has been found to possess remarkable anti-knock qualities. In itspreferred form my invention is directed to a motor fuel in which anilineitself is used or a derivative'thereof is employed, in conjunction witha blending agent.

The substituted anilines which have proven most satisfactory are alkyland phenyl substituted anilines such as the ethyl anilines, the methylanilines,-the diphenyl amines and derivatives thereof. My experimentsshow that the'best anti-knoek motor fuel is obtained by using anilinemixed with a relatively small proportion of a blending agent such asother or acetone.

The most satisfactory means of measuring the anti-knock ualities of amotor fuel is the well known ,idgely bouncing pin apparatus, wherein thevolume of gasgem erated in the apparatus is a measure of the detonationeffect. The less the volume of gasgenerated, the greater the anti-knockeffect of the fuel.

The following data using the fuel mix-- tures set forth were obtained byusing the Midgely bouncing pin apparatus. The

Application filed August 26, 1925. Serial No. 52,688.

experiments upon which the following re sults are based were made on thesame day .using the same apparatus on each mixture and the gasoline usedin each mixture was of ldentlcal quality coming from a single container.

Fuel mixture used. Volume (0. 0.) generated. 1. Straight gasoline 2.9 2.Gasoline benzol 50% 0. 3. Straight gasoline plus 1% aniline 1.4 4.Straight gasoline plus 71 other- 2. 4 5. Straight gasoline plus 1%aniline and ether 0. 8 6. Straight gasoline plus 1 aniline and 70 other0.55 7. Straight gasoline plus 2% aniline and other 0.35 8. Straightgasoline plus 3% aniline and 4% ether 0.25

In the above mixture, acetone may be substituted for the ether andsimilar results to those specified above will be obtained.

Upon reviewing the above data it will be seen that ether alone haspractically no effect on the anti-knock qualities of the motor fuel.Aniline alone in small quantities has some effect on the anti-knockqualities of the fuel but in general the anti-- knock qualities of thefuel is unsatisfactory. It is only when the blending agent is used inconjunction with aniline or its de- :rivatives, that a real anti-knockeffect is obtained. The fuel mixture 1%. 6 above gives an anti-knockvalue equivalent to a 50% gasoline and a 50% benzol mixture.

Instead of gasoline, hydrogenated hydrocarbons or hydrogenated naphtholsand naphthenes may be employed. Benzols may also be employed. In a highcompression motor having a comprtssion ratio in the neighborhood of oneto twelve, and a compression in the neighborhood of 500 pounds a motorfuel composed of benzol with approximately 3% aniline and 1 to l ofblending agent, such as ether, has proved.

peculiarly effective. To this mixture, gasoline may be added to alterthe B. t. u. value of the fuel.

The blending agent employed may be members of the class of others orketone such as dimethyl ether, diethyl ether, etc, and the ketones maybe dimethyl ketone, dlethyl 'ketoues, ethyl methyl, ketones or othermembers of this class.

Ill)

The above disclosure is merely illustrative of my invention.

\Vhat I claim is:

1. A motor fuel comprising a hydrocar- 5 bon, aniline and an ether.

l ether.

4. A motor fuel comprisin a hydrocarhon, aniline and ether, the lattertwo in quantity sufiicient to give to the motor fuel anti-knockcharacteristics comparable to a 50% benzol 50% gasoline mixture. 7

5. A motor fuel comprising benzol, aniline and ether.

In testimony whereof I aflix my signature. 4

JEAN LA RIBOISIERE.

